Why is WinSCP trying to upload the RTLOG_08513_20130505183529.DAT file? Do you have an explicit command to upload the file in your script? Or is the file removed while WinSCP is uploading whole directory?_________________Martin Prikryl

RTLOGs come to the directory D:\OracleRetailStore\Server\pos\bin\POSLog by default. From here my script FTPed these RTLOGs to Central Server and on successful transfer of a RTLOG, moved that RTLOG to D:\OracleRetailStore\Server\pos\bin\POSLog\archive folder.

There is no manual intervention with files present in this folder. Below is the sample script I am using:
echo option batch on > script_put.tmp
echo option confirm off >> script_put.tmp
echo open %session% >> script_put.tmp